EP0878385B1 - Apparatus for guiding a control cable - Google Patents

Apparatus for guiding a control cable Download PDF

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Publication number
EP0878385B1
EP0878385B1 EP98303739A EP98303739A EP0878385B1 EP 0878385 B1 EP0878385 B1 EP 0878385B1 EP 98303739 A EP98303739 A EP 98303739A EP 98303739 A EP98303739 A EP 98303739A EP 0878385 B1 EP0878385 B1 EP 0878385B1
Authority
EP
European Patent Office
Prior art keywords
cable
bearing
cable guide
guide surface
guide member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP98303739A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0878385A2 (en
EP0878385A3 (en
Inventor
Masanori Sugimoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shimano Inc
Original Assignee
Shimano Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shimano Inc filed Critical Shimano Inc
Publication of EP0878385A2 publication Critical patent/EP0878385A2/en
Publication of EP0878385A3 publication Critical patent/EP0878385A3/en
Application granted granted Critical
Publication of EP0878385B1 publication Critical patent/EP0878385B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C1/00—Flexible shafts; Mechanical means for transmitting movement in a flexible sheathing
    • F16C1/10—Means for transmitting linear movement in a flexible sheathing, e.g. "Bowden-mechanisms"
    • F16C1/12—Arrangements for transmitting movement to or from the flexible member
    • F16C1/18—Arrangements for transmitting movement to or from the flexible member in which the end portion of the flexible member is laid along a curved surface of a pivoted member
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K23/00—Rider-operated controls specially adapted for cycles, i.e. means for initiating control operations, e.g. levers, grips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62L—BRAKES SPECIALLY ADAPTED FOR CYCLES
    • B62L1/00—Brakes; Arrangements thereof
    • B62L1/02—Brakes; Arrangements thereof in which cycle wheels are engaged by brake elements
    • B62L1/06—Brakes; Arrangements thereof in which cycle wheels are engaged by brake elements the wheel rim being engaged
    • B62L1/10—Brakes; Arrangements thereof in which cycle wheels are engaged by brake elements the wheel rim being engaged by the elements moving substantially parallel to the wheel axis
    • B62L1/14—Brakes; Arrangements thereof in which cycle wheels are engaged by brake elements the wheel rim being engaged by the elements moving substantially parallel to the wheel axis the elements being mounted on levers pivotable about different axes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M25/00—Actuators for gearing speed-change mechanisms specially adapted for cycles
    • B62M25/02—Actuators for gearing speed-change mechanisms specially adapted for cycles with mechanical transmitting systems, e.g. cables, levers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/20—Land vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/20—Land vehicles
    • F16C2326/28—Bicycle propulsion, e.g. crankshaft and its support
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20396—Hand operated
    • Y10T74/20402—Flexible transmitter [e.g., Bowden cable]
    • Y10T74/20462—Specific cable connector or guide

Definitions

  • the present invention is directed to mechanical control cable mechanisms and, more particularly, to an apparatus for guiding a control cable that may be used to control brake or gear shifting devices on a bicycle.
  • Bicycle brake and shifting devices frequently use control cables of the type wherein an inner cable slides within an outer casing.
  • Such control cables usually are connected between a controlling device, such as brake lever, a shifting lever or twist grip shifter, and a controlled device such as a brake or a transmission. Since the controlled device ordinarily is located at some distance from the controlling device, and since the controlled device ordinarily is mounted at a fixed position determined by the configuration of the bicycle, the control cable often must follow a curved path from the controlling device to the controlled device. Unfortunately, when the cable must follow a steep curve, the outer casing sometimes cannot bend satisfactorily, or else the friction between the inner cable and the outer casing caused by the curve becomes excessive. As a result, such steep curves cannot be accommodated by the control cable.
  • One technique used to overcome the problem of bending the outer casing to follow sharp curves involves using a roller mounted on a frame, wherein the radius of curvature of the outer peripheral surface of the roller is set to match the required curve.
  • the frame may includes a cable entry portion and a cable exit portion, wherein the inner wire enters the cable entry portion, passes around the roller, and exits the cable exit portion. While this technique is satisfactory for many applications, the radius of the roller can not be made too small because the inner cable also resists bending. For example, when an inner wire is constructed of multiple strands wound together, the optimum radius of the roller is 200 times the diameter of a single strand. For a typical strand diameter of 0.32 millimetres, the optimum roller radius then would be approximately 64 millimetres.
  • the present invention is directed to a bicycle control cable guide apparatus in accordance with Claim 1. It comprises a frame having a first cable duct and a cable guide member mounted to the frame for rotation around a guide member axis.
  • the cable guide member includes a curved outer peripheral cable guide surface disposed radially outwardly from the guide member axis for guiding the cable.
  • a bearing having a cable guide surface is disposed radially outwardly from the outer peripheral cable guide surface, and in close proximity to the first cable duct such that rubbing of the cable in the first cable duct is reduced.
  • the cable guide member has a small radius of curvature, the cable may contact the bearing and thus avoid the excessive friction encountered in the prior art.
  • a second bearing having a second bearing cable guide surface is disposed radially outwardly from the outer peripheral cable guide surface.
  • the first bearing is spaced apart from the second bearing in a circumferential direction of the outer peripheral cable guide surface.
  • the frame includes a first cable duct and a second cable duct.
  • the first cable duct includes a first opening that tangentially aligns with the outer peripheral cable guide surface of the cable guide member
  • the second cable duct includes a second opening that tangentially aligns with the outer peripheral cable guide surface of the cable guide member.
  • the inner wire passes through the first cable duct, passes around the outer peripheral guide surface of the cable guide member and passes through the second cable duct.
  • the first bearing is aligned between the first cable duct and the outer peripheral guide surface of the cable guide member
  • the second bearing is aligned between the second cable duct and the outer peripheral guide surface of the cable guide member.
  • the bearings are thus positioned for maximum reduction of friction when the outer peripheral cable guide surface has a small radius of curvature.
  • the first and second bearings may comprise first and second rollers which accommodate the cable with very small friction.
  • the cable guide member in another embodiment, includes a curved outer peripheral cable guide surface disposed radially outwardly from the guide member axis for guiding the cable, wherein the cable guide surface terminates at first and second ends.
  • the cable guide member includes a first abutment and the frame includes a second abutment for contacting the first abutment and for limiting a range of motion of the cable guide member.
  • the cable guide member and the cable guide surface each has an approximately semicircular shape.
  • the cable guide member includes a bounded opening forming a first abutment and a second abutment
  • the frame includes a projecting member which forms a third abutment disposed between the first and second abutments for contacting the first and second abutments and for limiting a range of motion of the cable guide member.
  • a cable guide member constructed in this manner has a reduced size and weight over prior art structures.
  • a cable guide constructed according to the present invention may be used wherever cable bends are desired.
  • the cable guide may be positioned at a controlling device such as a brake lever, shifting lever, twist grip shifter or other controlling device.
  • the cable guide may be positioned at a controlled device such as a brake arm, hub brake, derailleur, internal hub transmission, or other controlled device.
  • Figure 1 is a partial cross sectional front view of a particular embodiment of a cable guide 10 according to the present invention
  • Figure 2 is a rear view of cable guide 10.
  • cable guide 10 includes a frame 14 having a first cable duct 18 and a second cable duct 22.
  • first and second cable ducts 18 and 22 are formed as tubular members having first and second cable duct openings 26 and 30.
  • first cable duct opening 26 is sized for receiving an outer casing 40 of a control cable 42 therein
  • second cable duct opening 30 is sized for receiving an inner cable 34 of control cable 42 therethrough.
  • a cable guide member 50 having a curved outer peripheral cable guide surface 54 is mounted to frame 14 through a pivot shaft 58 for rotation around a guide member axis X.
  • cable guide member 50 and cable guide surface 54 each has a roughly semicircular shape and includes openings 60, 62 and 64 to reduce the size and weight of the structure.
  • Opening 62 includes abutments 65 and 66 which cooperate with an abutment formed by a stop pin 44 extending from a side of frame 14 to limit the range of motion of cable guide member 50.
  • Opening 62 should have an angular distance that corresponds roughly to the intended cable stroke. Stop pin 44 and abutments 65 and 66 allow the use of a cable guide member 50 having a semicircular shape without the risk of the inner cable 34 falling off the cable guide surface 54.
  • a first bearing in the form of a first roller 70 is mounted to frame 14 through a pivot shaft 74 for rotation around a first roller axis Y
  • a second bearing in the form of a second roller 78 is mounted to frame 14 through a pivot shaft 80 for rotation around a second roller axis Z, wherein guide member axis X, first roller axis Y and second roller axis Z are substantially parallel to each other.
  • Roller 70 is disposed radially outwardly from outer peripheral cable guide surface 54 in close proximity to first cable duct 18 and is aligned between first cable duct 18 and outer peripheral cable guide surface 54.
  • roller 78 is disposed radially outwardly from outer peripheral cable guide surface 54 in close proximity to second cable duct 22 and is aligned between second cable duct 22 and outer peripheral cable guide surface 54.
  • cable guide member 50, first roller 70 and second roller 78 are completely exposed on frame 14.
  • first and second cable duct openings 26 and 30 both are substantially tangentially aligned with outer peripheral cable guide surface 54.
  • first and second rollers 70 and 78 include respective first and second cable guide surfaces 86 and 88 that lie substantially in the same plane as outer peripheral cable guide surface 54.
  • first and second rollers 70 and 78 are positioned at substantially the same radial distance from guide member axis X.
  • Inner cable 34 passes through first cable duct opening 26, passes around outer peripheral cable guide surface 54, and passes through second cable duct opening 30.
  • outer peripheral cable guide surface 54 has a small radius of curvature and therefore defines a steep curve such that inner cable 34 resists bending around outer peripheral cable guide surface 54, then inner cable 34 will contact first cable guide surface 86 and/or second cable guide surfaces 88. Unlike prior art structures, very little friction is created between inner cable 34 and rollers 70 and 78, so cable performance is not adversely affected.
  • cable guide member 50 may have a radius of 17.5 millimetres or more, preferably 19.2 millimetres, or 20 millimetres to the centerline of the inner cable.
  • FIG. 3 shows cable guide 10 mounted to a brake assembly 100.
  • brake assembly 100 includes a brake arm 104 and a brake arm 106.
  • a brake shoe 108 is mounted to an intermediate portion of brake arm 104, and a brake shoe 110 is mounted to an intermediate portion of brake arm 106.
  • a connecting link 114 having a mounting flange 115 is pivotably mounted to the upper end of brake arm 104 through a pivot shaft 118, and a wire connector 122 is disposed at the upper end of brake arm 106.
  • Frame 14 of cable guide 10 is mounted to connecting link 114 by inserting second cable duct 22 into mounting flange 115.
  • Outer casing 40 of a control cable 42 is fitted within first cable duct opening 26, and the end of inner cable 34 is fixed to wire connector 122.
  • a sealing member 116 is fitted around second cable duct 22 and inner wire 34 to help prevent contaminants from entering second cable duct 22.
  • inner cable 34 bends around an angle of approximately 90° with little friction as it proceeds from brake arm 104 to brake arm 106.
  • FIG. 4 shows the cable guide 10 mounted to a control lever assembly 200.
  • a mounting bracket 204 is structured for mounting a control member such as a brake lever 208 to a handlebar H.
  • Brake lever 208 is pivotably mounted to mounting bracket 204 through a pivot shaft 212, and mounting bracket 204 includes a cable adjustment barrel 216 having a barrel opening 220 through which inner cable 34 passes.
  • Frame 14 of cable guide 10 is mounted to mounting bracket 204 by inserting second cable duct 22 into barrel opening 220.
  • first roller 70 and second roller 78 inner cable 34 bends around an angle of approximately 90° with little friction as it proceeds from first cable duct 18 to the cable attachment point (not shown) on lever 208.
  • FIG. 5 shows the cable guide 10 mounted to a derailleur 300.
  • Derailleur 300 may be a conventional derailleur that includes a base member 304 which mounts derailleur 300 to a bicycle frame (not shown), link members 308 and 312, and a movable member 316 supporting a chain guide 320.
  • Base member 304, link members 308 and 312, and movable member 316 are connected together in the conventional way to form a four-bar linkage mechanism for guiding chain guide 320 among a plurality of sprockets (not shown) mounted to a rear wheel of the bicycle.
  • the invention also could be applied to a front derailleur, and derailleurs other than a four-bar linkage type may be used as well.
  • first cable duct 18 and second cable duct 22 form an acute angle, rather than the 90° angle formed in the previous embodiments.
  • Frame 14 of cable guide 10 is mounted to derailleur 300 by inserting second cable duct 22 into an opening 322 of a cable guide 324 formed in base member 304.
  • opening 322 ordinarily is sized for receiving outer casing 40 of control cable 42, so second cable duct 22 has approximately the same outside diameter as outer casing 40.
  • Inner cable 34 of control cable 42 passes through cable guide 324 and attaches to a cable connector 330 fixed to the side of link 308.
  • first roller 70 and second roller 78 inner cable 34 can bend around a very acute angle (or any desired angle) with little friction as it proceeds from first cable duct 18 to cable connector 330.
  • cable guide member 50 may be formed as a full circle as shown in phantom in Figure 1 instead of a semicircle.
  • Cable guide member may be formed as a solid, and stop pin 44 may be omitted.
  • Frame 14 may be formed to cover part or all of cable guide member 50, first roller 70 or second roller 78 rather than leaving these components exposed.
  • Rollers 70 and 78 may be replaced by solid members having low coefficients of friction.
  • First cable duct 18 and second cable duct 22 may be shaped to mate with any desired structure, and they may be placed at whatever orientation is desired to make the inner cable bend at the desired angle.
  • the components may be formed from many different materials.
  • cable guide member 50, first roller 70 and second roller 78 may be formed from Polyoxymethylene, and frame 14 may be formed from aluminum.
  • frame 14 may be formed from aluminum.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Flexible Shafts (AREA)
  • Guides For Winding Or Rewinding, Or Guides For Filamentary Materials (AREA)
  • Ropes Or Cables (AREA)
EP98303739A 1997-05-14 1998-05-13 Apparatus for guiding a control cable Expired - Lifetime EP0878385B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/856,719 US5855529A (en) 1997-05-14 1997-05-14 Apparatus for guiding a control cable
US856719 1997-05-14

Publications (3)

Publication Number Publication Date
EP0878385A2 EP0878385A2 (en) 1998-11-18
EP0878385A3 EP0878385A3 (en) 2000-07-19
EP0878385B1 true EP0878385B1 (en) 2005-07-20

Family

ID=25324342

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98303739A Expired - Lifetime EP0878385B1 (en) 1997-05-14 1998-05-13 Apparatus for guiding a control cable

Country Status (9)

Country Link
US (1) US5855529A (zh)
EP (1) EP0878385B1 (zh)
CN (2) CN1227464C (zh)
CZ (1) CZ9801475A3 (zh)
DE (1) DE69830868T2 (zh)
PL (1) PL191128B1 (zh)
RU (1) RU2222457C2 (zh)
SK (1) SK285024B6 (zh)
TW (1) TW487663B (zh)

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US6557671B1 (en) 2000-03-20 2003-05-06 Shimano, Inc. Cable disc brake
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US6802398B2 (en) * 2001-01-16 2004-10-12 Delphi Technologies, Inc. Manual cable release apparatus for a motor actuated park brake for a vehicle
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US8277346B2 (en) * 2006-02-28 2012-10-02 Shimano, Inc. Low profile rear derailleur
US8025598B2 (en) * 2006-10-24 2011-09-27 Shimano, Inc. Low profile rear derailleur with a chain receiving space
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FR2965866B1 (fr) 2010-10-08 2013-11-01 Peugeot Citroen Automobiles Sa Dispositif pour transmettre des efforts de traction entre au moins deux cables
US10443646B2 (en) 2015-05-11 2019-10-15 Sri International Efficient bowden cable system
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US10501147B2 (en) * 2017-08-22 2019-12-10 Shimano Inc. Bicycle derailleur
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Also Published As

Publication number Publication date
EP0878385A2 (en) 1998-11-18
EP0878385A3 (en) 2000-07-19
CN1227464C (zh) 2005-11-16
DE69830868T2 (de) 2006-04-20
DE69830868D1 (de) 2005-08-25
US5855529A (en) 1999-01-05
CN1334215A (zh) 2002-02-06
CN1096383C (zh) 2002-12-18
CN1223217A (zh) 1999-07-21
TW487663B (en) 2002-05-21
PL326283A1 (en) 1998-11-23
PL191128B1 (pl) 2006-03-31
SK285024B6 (sk) 2006-04-06
RU2222457C2 (ru) 2004-01-27
CZ9801475A3 (cs) 2001-09-12
SK63798A3 (en) 1999-01-11

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